Abstract: Aim to optimum-desulfurize the pipeline steel 37Mn (/%: 0. 37C, 0. 21 Si, 1. 44Mn, 0. 010P, 0.003 4 S) in 90t RH refining process at steelworks, in laboratory the desulfurization test on the pipeline steel with 17 schemes including original works slag series: 50CaO-35 Al₂O3₃-7SiO₂ -8 MgO and desulfurization agent: 75. 4CaO-20. 1CaF2₂and optimum slag series: 57CaO-25Al₂O₃-10SiO₂-8MgO and desulfurization agent: 70CaO-30CaF₂ has been carried out by a GL-2 type high temperature tubular resistance furnace. Results show that desulfurization effect of 57CaO-25Al₂O₃-10SiO₂-8MgO refining slag series combined with 70CaO-30CaF₂ desulfurization agent is best, and as slag amount is 5 kg/t steel combined with desulfurization agent of 0. 7 kg/t steel, the sulfur content in liquid could be decreased to 10 x 10^-6.

摘要： 以钢厂90 t RH精炼过程管线钢37Mn(/%:0.37C、0.21Si、1.44Mn、0.010P、0.003 4S)脱硫优化为目标,在实验室用GL-2型高温管式炉对原工厂用渣系:50CaO-35Al₂O₃-7SiO₂-8MgO和脱硫剂:75.4CaO-20.1CaF₂及优化渣系:57CaO-25Al₂O₃-10SiO₂-8MgO和脱硫剂:70CaO-30CaF₂共17个方案进行管线钢脱硫试验。结果表明,57CaO-25SAl₂O₃-10SiO₂-8MgO精炼渣系和配合70CaO-30CaF₂脱硫剂使用对钢液的脱硫效果最好,并且当渣量为5kg/t,脱硫剂量为0.7 kg/t时,能使钢液中的硫含量降到10×10^-6。

关键词: 管线钢37Mn, RH精炼, 精炼渣, 脱硫剂